Add vpatch-CVE-2025-52970 rule and test

[crowdsec-automation]

This rule detects attempts to exploit CVE-2025-52970, an authentication bypass in Fortinet FortiWeb, by looking for crafted requests to the sensitive endpoint /api/fabric/device/status with a suspicious Authorization header. The attack leverages SQL injection-like payloads in the Authorization header, typically starting with a single quote and semicolon (';). The rule:

• Matches requests to the /api/fabric/device/status endpoint (case-insensitive).
• Checks if the authorization header contains the substring ';, which is a strong indicator of the exploit attempt as seen in the provided nuclei template payloads.
• Uses lowercase transformation to ensure case-insensitive matching.
• The rule avoids false positives by only triggering when both the endpoint and the crafted header are present.
• The test nuclei template is adapted to send a representative exploit payload and expects a 403 response, indicating the WAF blocks the attack.

Validation Checklist:

• All value: fields are lowercase.
• transform includes lowercase where applicable.
• No match.value contains capital letters.
• Rule uses contains instead of regex where applicable.

[github-actions]

Hello @crowdsec-automation and thank you for your contribution!

❗ It seems that the following scenarios are not part of the 'crowdsecurity/appsec-virtual-patching' collection:

🔴 crowdsecurity/vpatch-CVE-2025-52970 🔴

[github-actions]

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